समाकलन ज्ञात कीजिए: $\int \frac{\sqrt{x^2+1}\left[\log \left(x^2+1\right)-2 \log x\right]}{x^4} d x$

  • A
    $\frac{1}{9}\left(1+\frac{1}{x^2}\right)^{\frac{3}{2}}\left[2-3 \log \left(1+\frac{1}{x^2}\right)\right]+c$
  • B
    $\frac{1}{3}\left(1+\frac{1}{x^2}\right)^{\frac{1}{2}}\left[6-\log \left(1+\frac{1}{x^2}\right)^2\right]+c$
  • C
    $\frac{1}{9}\left(1+\frac{1}{x^2}\right)\left[3-2 \log \left(1+\frac{1}{x^2}\right)^{\frac{1}{2}}\right]+c$
  • D
    $\frac{1}{3}\left(1+\frac{1}{x^2}\right)^{\frac{3}{2}}\left[3+\log \left(1+\frac{1}{x^2}\right)\right]+c$

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फलन का समाकलन कीजिए: $\left(x^{2}+1\right) \log x$

Difficult
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यदि $\int x^3(\log x)^2 d x = x^4[A(\log x)^2 + B(\log x) + C] + K$ है, तो $A + B + C$ का मान ज्ञात कीजिए।

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